How to redirect sip (IPTABLES)?

Question

linux

Good day, there is a network 192.168.1.0/24
in this network there are two masters.
the first aster - 192.168.1.1
the second aster - 192.168.1.2
has a sip from the provider 10.66.66.66.
The link from the provider physically enters the first aster, how can I redirect from the first aster to 10.66.66.66 for the second aster?
i.e. when registering provider numbers on the second aster, the first aster acts as a server, which redirects traffic from 10.66.66.66:5060, for example, to 192.168.1.1:5660

Answer 1

Iptables won't be able to do this because SIP traffic is too complex. You will have to write the correct dialplan.

Answer 2

With the help of iptables, all you can do is redirect all traffic from 10.66.66.66 to the second aster - but then the first aster will no longer receive this traffic. - I don't think this is what you need.